Lynde, Carleton John, b. 1872, Gilbert, Alfred C. (Alfred Carlton), 1884-1961 · New Haven, Conn. : A.C. Gilbert Co. · leaf 42
Fig. 65. You see the candle burning in water long and 3^4 incheswide and high. Cutthe box into two equalparts at an angle of45° (see 1, Fig. 70),turn the halves as in2, cut a hole in onehalf, its center being2 inches from the end.Cut two trapdoorsand attach to each aloop of cord for open-ing it.…
Light · Scientific recreations
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